Pump-coupling.



B. F. MOHR. PUMP GOUPLNG'. APPLIGMION HLM: MAE. 21,V 190s.

Patented. Feb. 1,1910.

2 SHEETS-SHEBT L S51/wants@ B. MOHR.

` PUMP GOPLNG. APPLICATION FILED MAR. 21, 190s..

Patented Feb. 1,1910.

'2 SHEETS-'SHEET 2.

'entre srs earn irre BENJAMIN F. MOHR, OF MIFFLINBURG, PENNSYLVANIA.

PIVP-COUPLING.

Specification of Letters Patent.

Patented Feb. 1, 1910.

To all whom 'it may concern:

`Be 1t known that I, BENJAMIN F. Morin,

`citizen of the United States. residing` at Mitllinburg, in thc` county of Union and State of Pennsylvama, have invented certain new and useful improvements m Pump-Couplings, of which the following is f a specification.

The present invention relates to pumps which are designed'to be operatedv either by hand, a pump jack, or other power, and has for its object to prov1de novel means for thro'ing the connections into and out of gear accordiilg to the power toibo applied i for working the pump.

For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, "reff erence is to be had to the following description and accompanying drawings.

`While the invention may be adapted to I different forms and conditions by changes in the structure` and minor details without departing from the spirit or 'essential features thereof, still the preferred embodiment is shown in the aceonipanying draw 2 ings, in which Figure 1 is a perspective view of a pump i. Fig. 2 1s a deembodying the invention. tail view partly in section of the pump head,

rack bar and cooperating segment. Fig. 3 is a section on the line X--X of Fig. 2.

Fig. f1 is a top plan View of the cross bar, the pump rod being in section. Fig. 5 is a front' View of the parts shown in Fig. 2. Fig. 6 is a view similar to Fig. 5 of a modification, the segment being moved into gear with the rack bar. Fig. 7 is a side view of the modified form of rack bar illustrated in Fig. 6. Fig. 8 is a detail perspective view of the connecting means between the pump rod and Fin'. 6.

(orresponding and like parts are referred to in the following description andindicated in all the Views of the drawings by the samereference characters.

The pump 1 may be of any type, as well as the pump jack, the latter including the crank shaft 2 and the crank arms to which The pump I pitmen shown in the modification, g

t or forming a part of the pump rod. The pump head is preferably formed of similar 3 sections, each consisting of a member 7 and a clampelement 8. The clamp elements 8 are adapted to embrace opposite sides of the E pump body or barrel and are secured thereto by means of bolts or like fastenings passed through apertured ears forming a part of said clamp elements 8. The members 7 are [transversely spaced and are connected at their upper ends to a block 10 which is apertured to receive the pump rod t and dil rect the same in its reciprocating move-v ments. Arms 11 project laterally from the members T and are transversely apertured to receive the axle 12 of the segment 5. Other arms 13 project from the members 7 in an opposite direction to the arms 11 and Support a roller 1l which sustains the lateral thrust upon the bar G when the pump is opf erated by hand. The teeth of the rack bar 6 are irregular, as shown most clearly inl Figs. 2 and 7, and the teeth of the 'segment 5 are likewise irregular and constructed to match with the teeth of the rack bar when the parts i 5 and G are in proper position. The irregularity of the 'teeth is such as to prevent throwing the segment into mesh with the rack bar until said parts have been properly adjusted to bring corresponding teeth into matching position. As a result of this construction, the segment when in coperative position with the rack bar, occupies a given or predetermined relationship so as to insure proper operation of the pump by means of the handle 15 attached to or forming a part of said segment. A projection -16 is provided at the lower end of the rack bar 6 to limit the upward movementy of the pump rod and the downwardmovement of the outer end of handle 15. A corresponding projection may be provided at the upper end of the rack bar, as indicated in Figs. 6 Aand 7, to limit the downward movement of the pump rod and the upward movement of the handle 15. The projections 1G and 17 also prevent lateral movement of the segment when the pump rod is at or near the limit of its stroke in each direction. The axle 12 of the segnient 5 is mounted in the arms 11 so as to turn freely therein, as well as to move longitudinally, thereby admitting of the segf ment being moved laterally to bring its teeth ,i into or out of meshing relation with the i teeth of the rack bar G.

l The object of the stops 16 and 17 is to i i l i rod 4, and when said pump rod is discon-I prevent any possible disconnection between the rack 6 and the segment. ltwill be seen that withva construction of'this class a disconnection between these two members in operating might be disastrous, 'as the segment would disconnect from the pump rod and allow the pump rod to drop. vantage of the irregular teeth for the rack bar and segment is also obvious inasmuch as ot/herwise there is no positive way by which the segment may be placed in mesh with the rack bar, so that the middle of vthe segment shall come against the middle of the' rack. The extremity of the rack bar might be en gaged witln the middle of the segment, and hence a very small stroke would be allowed. The change of one tooth more or less to one side or the other of the segment would alter the stroke of the pump and very much lessen its eliciency. The construction shown pro-.

vides therefore, for an easy connection of the segment with the rack bar by a laterally sliding movement, an extremely simple construction which cannot easily get out of order -and is of Very little cost. It also provides for the positive relation between the segment and rack bar andmeans for pre venting the disconnection of the rack bar with the segmentat the extremities of its movement. All these elements are peculiarly necessary with my construction and with pum s in general. l

A crossv ar 18 is rovided at opposite ends with journals 19 w ich obtain a bearing in the pitmen 3 yso as to transmit motion to the pump rod when the latter is connected with said cross bar. An eye 2O is provided centrally of the cross bar 18 to receive the pump nectedfromthe pitmen and is operated by hand, or by a wind mill, said pump rod moves freely in the eye or opening 20 of the cross bar. When it is required to operate the pump by'means of the pump jack, the `cross bar 18 is secured to the pump rod by means of a lock dev'ce which consists, essentially, of -a lock bolt 2 1, the same o erating through'a portion'of the e e 20 an apart at the outer end of sai cross bar and adapted to have its yinner end enter an openin provided in saidpump rod. The lock bo t 21 may be operated by hand and is normally pressed inward by means of a spring 22 mounted thereon. .A pin 23 passed through an opening of the lock bolt 21 sustains theend thrust of the spring 22 and forms a stop to engage with a shoulder 24 to hold the lock bolt out of engagement with the pump rod .when the pumpjack is thrown out of gear, Fig. 4. n the modification shownan Figs. 6 and 8the lock bolt 21 is engaged b means oa flat spring 25 secured at one "en to a pitman 3. A lever 26, pv`

oted at .27 to the pitman provided with the spring 25, has a projection 28 extended into The adthe path of the spring 25 to throw the lock bolt out of engagement with the pump rod, when it is required to operate the pump by hand.

lVhen the pump is to be operated either by means of the pump jack, or other power than by hand, the segment 5 is moved laterally, as indicated in Figs. 3 and 5, to throw its teeth out of mesh with the teeth of the rack bar (i, thereby admitting of the pump rod being reciprocated without imparting any movement to thel handle 15, which would be objectionable as readily comprehended.

'lVhen the pump is to be operated by hand,

the lock bolt 21 is moved so as to disconnect the cross bar and pitmen. from the pump rod 4, and the segment 5 moved laterally to bring its teeth' in meshing lrelation with the teeth of the rack bar. Alfter this change has been eiected, the pump may be operated by hand through the instrumentality of the handle 15 without imparting any movement to the cross bar 18 or the pitmen 3; A latch 29 is pivoted to one of the arms 11 andserves to hold the axle l2 when moved to bring the segment in mesh with the rack, so

iro

as to prevent casual displacement of the parts -5 and 6 when operating the pump by hand.

Having thus described the invention, what is claimed as new is:

l. In a pump, the combination with a rack bar connected with a pump rod, of a pitman for transmitting power to the pump rod, means forv detachably engaging the pitman to the pump rod, a yoke located on the pump structure and having a transverse pivot pin, a toothed segment pivotally mountedon the pivot pin and shiftable laterally thereon, the said segment in one position` engaging with the raclr bar and in `the other position beino disengaged therefrom, and said segment eing provided with a handle whereby it may be operated, andme'ans for limiting the movement of the rack bar relative to the segment.

2. In a. pump, the combination with a rack' bar connected to a pump rod, of a pitman fortransmitting ower to the pump rod, means for detachab y engaging the pitman with the rod, a yoke supported on the pump structure and haring a transverse' pivot pin, a toothed segment mounted onA the pivot pin and transversely shiftable thereon, in one position lengagmg with the rack andin the other position bein disengaged therefrom, .and stops on the rac 'at opposite ends of same engageable with the segment to limit the upward and downward movement 0f the rack bar.-

3. In a, pump of the character described,

llt)

the combination with a pump rod and a l rack bar connected thereto, said rack bar having its teeth irregular along its whole extent, of a pitman for transmitting power to the pump rod, means for detachably engag- 'ing the pitman -with the pump rod, a yoke supported on the pump structure and havstopsjat each end limiting t e movement of the se' ent relative thereto.

4. a pump, the combination ola rack `bar connected to a'pump rod, said bar having teeth irregular along the Whole extent of the rack -bar, of a pitman for transmittin ower to the pump rod, means for detac a ly connecting the pitman with the rack bar, a yoke supported on the pump structure, a transversely extending pivot in in the yoke, and a segment laterally shiftable along the pin into and out of engagement with the rack bar and having a handle the teeth of-said segment being irregular and so shaped that the middle teeth ot the segment- Will engage with the middle teeth of said rack bar, the rack being provided with means for limiting its motion relative to the segment. v

5. The combination with a pump barrel, of-a'yoke' mounted thereon, a pump rod, a rack bar connected to the ump rod, pitmen located on either side of t e pump bal-rel, a cross'bar connected to said pitmen aiidhaving an eye through which the rabkl bar passes, a spring actuated bolt passing transversely through one end of the into the said eye and engageab e with the rack bar, means for holding the bolt out of engagement with the rack bar, a transverse pivot pin mounted on said yoke, and laterally shiftable therein, a segment gear shiftable transversely With said pivot pin into and out of engagement With the rack bar, said gear having a projecting handle, and alatch for holding the segment in it adjusted position.

In testimony whereof I affix my signature in presence of two Witnesses.

BENJAMIN F. Morin. [1.. 5.]

Witnesses:`

l V. B. HILLYARD, W. N. lVooDsoN.

itmen and p 

